Rotary steam-engine.



, N0. 746,420. PATENTED DEC. 8, 1903.

J. J. WALLEY.

ROTARY STEAM ENGINE.

IIIIIIIIIIIIIIIIII PT.'10. 1901. RENEWED NOV. 10. 1903.

'-No. 746,420. PATENTED DEC. a, 1903 J. J. WALLEY.

ROTARY STEAM ENGINE. APPLICATION FILED SEPT. 10. 1901. nmuzwnn NOV. 19,1903.

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PATENTED DEC. 8, 1903.

J. J. WALLEY. RUTARY STEAM ENGINE. APPLICATION FILED SEPT. 10. 1901.RENEWED NOV. 10, 1903.

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1m MODEL.

James J 772229 UNITED STATES MESNE ASSIGNMENTS, ANOKA, MINNESOTA.

Patented December 8, 1903.

JAMES J. WALLEY, OF ANOKA, MINNESOTA, ASSIGNOR, B Y DIRECT AND OFONE-HALF TO JOHN A. HEFFILFINGER, OF

'ROTARY STEAM-ENGINE.

SPEGIFI'GATION forming part of Letters Patent No. 746,420 dated.December 8, 1 903.

Application filed September 10, 1901. Renewed November 10, 1903. SerialNo. 180.576. (No model.)

To aZl whoml it concern:

Be it known that I, JAMES J. WALLEY, a citizen of the United States.residing in the city of Anoka, county of Anoka, and State of Minnesota,have invented certain new and useful Improvements in RotarySteam-Engines, of which the following is a specifica tion.

My invention relates to improvement-sin rotary steam-engines; and theobjects of the same are to provide an engine which maybe run at a highrate of speed, which will create but little friction, and which willhave practically no lost motion.

Another object is to provide a single or compound engine which may bestarted and stopped at any point or which will be practically without adead-center.

Still another object is to provide an engine that will run rapidly,steadily, economically,

' and in any position and which will occupy but little floor-space.

Another object is to provide an engine comprising comparatively fewparts and which will dispense with valves and the steam-chest betweenthe high and low pressure cylinders.

These objects and advantages are attained by means of the mechanismillustrated in the accompanying drawings, in which- Figure 1 is avertical longitudinal section throughthe center of the entire engine.Fig. 2 is an enlarged sectional elevation of the high-pressure cylinderand its rotary piston." Fig. 3 is a sectional elevation of thelow-pressure cylinder and its rotary piston. Fig. 4 is a detailperspective view of one of the buckets detached from the piston, saidbucket being of the same construction for the high and low pressurecylinders. Fig. 5 is a side view and partial section of the cut-offslide-valve and its operative mechanism. Fig. 6 is a detail view andpartial section of a cam-latch which I may utilize.

' Like numerals of reference designate like parts wherever they occur inthe different views of the drawings. 1

Referring to Fig. l of the'drawings, the numeral 1 designates thehigh-pressure cylinder, and 2 the low pressure cylinder. These cylindersmay be formed as a single casting with the base or support 3 and may beprovided with removable cylinder-heads 4: 5. A shaft 6 extendseccentrically throughboth cylinders and is journaled at one end in astandard 7. A combined fiy-wheel8anddriving-pulley 9 is keyed to theshaft 6. Secured to the shaft 6 within the cylinder 1 is a rotary piston10, Fig. 2, carrying spring-actuated buckets 11, which bear upon theinterior surface of the cylinder 1 by means of the spring 12. Secured tosaid shaft 6 within cylinder 2 isa rotary piston 13,al'so provided withspringactuated buckets 15, similar in construction to the buckets 11.These buckets are fitted in-recesses in the periphery of the piston 13and are'pivoted at 16 to the piston, as shown in Fig. 4. Springs 17exert an outward pressure upon the buckets 15 and always keep the edge18 in contact with the interior wall of the cylinder. An inlet-port 19is formed at the top of the cylinder 1, and a steam-chest 20 is seatedupon said cylinder above the inletport 19. A cut-01f slide-valve 21 isactuated to intermittently cover and uncover the port 19 by means of avalve-stem 22, which passes through one wall of the steam-chest and atits outer end is pivotally connected to a lever 23. The lever 23 iscentrally pivoted at 2&1 to a bearing 25,'and the opposite end of saidlever 23 is pivoted to a slide 26, actuated by adam 27, formed as anintegral portion of a band-pulley 28, secured to the shaft 6. A

cam-latch 36 is pivoted to the lower end of the lever 33 and is providedwith a slot 37 to accommodate the pin 38 on the hand-lever 32, andaspring 39 returns the latch 36 to its original position afterit hasbeen moved by the lever 32. A notch 40 in the latch is designed to catchover a pin 41 to hold the latch in one position, and a spring-bolt 42retains the latch in place against displacement until the latch is movedby the lever 32. The pulley 28 may be connected by a belt to the pulley29 on the governor-shaft 30. The ball-governor 31 is actuated directlyfrom the driving-shaft and regulates the speed of the engineexpansively. A hand-lever 32 controls the slidevalve 21 and is used forstarting and stopping the engine.

Referring to Fig. 2, a steam-inlet pipe 33 connects with the steam-chest20, and when the hand-lever 32 is moved the steam is admitted throughport 19 to the high-pressure cylinder 1 to rotate the piston 10, as Willbe understood. At each rotation of the cylinder the steam passes throughthe outlet-pipe 34, which leads to the low-pressure cylinder 2 at 35,Fig. 1, and thus utilizes the exhaust from the high-pressure cylinder todrive the shaft 6. The buckets 11 and 15 may be secured to the pistons10 and 13 at relatively opposite points in order to overcome thedeadcenter.

Without desiring to be limited to the exact details of construction, asthese may be varied within certain limits without departing from thespirit and scope of my invention, what I claim is- 1.Arotaryenginecomprisingtwocylinders of relatively different areas, ashaft passing centrally through said cylinders and having securedthereto a piston for each cylinder, spring-actuated buckets upon theperipheries of said pistons,a slide-valve for intermittently admittingsteam to one of the cylinders, a

ally-mounted pistons, yielding buckets secured to the peripheries ofsaid pistons, a steam-chest seated upon the high-pressure cylinder, aslide-valve in the steam-chest, means for intermittently actuating saidslidevalves, and a hand-lever for moving the valve to start and stop theengine, substantially as described.

3. In a compound rotary engine, high and low pressure cylinders formedas a single casting and having detachable cylinder-heads, in combinationwith a shaft passed centrally through the casting and carrying eccentrically-mounted pistons, an inletport in the high-pressure cylinder, andmeans for automatically opening and closing said port, substantially asdescribed.

4. In a compound rotary engine, high and low pressure cylinders,a shaftpassing through said cylinders and carrying eccentricallymountedpistons, a combined fly-wheel and belt-pulley secured near one end ofsaid shaft, a combined cam and band -pulley secured near the other endof said shaft, a slide-valve actuated by said cam, a governor, and meansfor actuating the governor directly from the main driving-shaft,substantially as described.

JAMES J. WALLEY.

Witnesses:

MILTON E. WILCOX, FRED S. STEWART.

